岩堂沢

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岩堂沢 flows into 大谷川 , which it joins at N 38° 43′ 30″, E 140° 39′ 59″ at OSM node n754556656, and there 41 km of total upstream flows in. load it's distributaries

岩堂沢 has 2 tributaries.

• (unnamed), which joins it at N 38° 41′ 46″, E 140° 38′ 18″ at OSM node n9834819272, and 7 km of total upstream flows in.
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• 熊沢, which joins it at N 38° 42′ 45″, E 140° 39′ 7″ at OSM node n754640460, and 3 km of total upstream flows in.
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